updating support libraries to AndroidX

app/build.gradle

@@ -9,7 +9,7 @@ android {
     defaultConfig {
         applicationId "com.simplemobiletools.flashlight"
         minSdkVersion 16
-        targetSdkVersion 27
+        targetSdkVersion 28
         versionCode 30
         versionName "4.1.0"
         setProperty("archivesBaseName", "flashlight")
@@ -41,9 +41,9 @@ android {
 }
 
 dependencies {
-    implementation 'com.simplemobiletools:commons:4.6.5'
+    implementation 'com.simplemobiletools:commons:4.9.1'
     implementation 'com.squareup:otto:1.3.8'
-    implementation 'com.android.support.constraint:constraint-layout:1.1.2'
+    implementation 'androidx.constraintlayout:constraintlayout:2.0.0-alpha2'
 }
 
 Properties props = new Properties()

app/src/main/res/layout/activity_main.xml

@@ -7,7 +7,7 @@
     android:layout_height="match_parent"
     android:fillViewport="true">
 
-    <android.support.constraint.ConstraintLayout
+    <androidx.constraintlayout.widget.ConstraintLayout
         android:id="@+id/main_holder"
         android:layout_width="match_parent"
         android:layout_height="wrap_content">
@@ -66,5 +66,5 @@
             app:layout_constraintStart_toStartOf="parent"
             app:layout_constraintTop_toBottomOf="@+id/stroboscope_btn"/>
 
-    </android.support.constraint.ConstraintLayout>
+    </androidx.constraintlayout.widget.ConstraintLayout>
 </ScrollView>

gradle.properties

@@ -16,3 +16,5 @@
 # This option should only be used with decoupled projects. More details, visit
 # http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects
 # org.gradle.parallel=true
+android.enableJetifier=true
+android.useAndroidX=true